Kameno_Seiji_Level_Histogram_of_Quantized_Signals_for_Digitizer_Calibration

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We propose a capability to record level histogram of digitized signals for the sake of accurate amplitude calibration. Current ALMA correlators apply Van Vleck correction based on autocorrelation amplitude under assumption that quantization voltages in the digitizers are equally spaced. The real ALMA digitizers have 3-4% non-uniformity in 8 quantization voltage levels (CSV-2311). The non-uniformit...

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